Changes to List all orders

added the optional property data/items/attributes/formatted_subtotal_after_discount to the response with the 200 status

added the optional property data/items/attributes/subtotal_after_discount_cents to the response with the 200 status

added the optional property data/items/attributes/subtotal_after_discount_float to the response with the 200 status

added the media type application/vnd.api+json for the response with the status 200